Road-building form



March 30 1920.

jB. H. KERSTING ET A1.

ROAD BUILDING FORM 2 Sheets-Sheet l Filed May 7 1925 Q 7 MV QMWW mw o i NMO. 0 .Edif W www@ ,w/

W/TA/ExSSES March 30 1926.

B. H. KERSTING ETI AL ROAD BUILDING FORM Filed May '7.

1925 2 Sheets-Sheet 2 /N VEN TORS ...IIIII ||..||I\. lllll lllllllllll WITNESSES Patented Mar. '30, 19.2'6.

- l 1,579,000 UNITED STATES PATENT omer..

EERNARnH'. KERSTING',"OE BEN AVON, AND VERE E. EDWARDS, OE YOOEAOroms,v -EENNSYLVANIA, AssIGNORs 'ro THE BRAVO CONTRACTING COMPANY, OE rIfljTs- EURGH, PENNSYLVANIA, A CORPORATION lOE rENNsYLvANrA.l f

ROAD-BUILDING FORM.

' Application led May 7, 1925. Serial No. 28,626.

Taall whom t may concern:

'Beit known that we, BERNARD H. KERST'- ING and VERE B. EDWARDS, residing at Ben Avon and Coraopolis, respectively, in the county of Allegheny and State ofl Pennsylvania, citizens of the United States, have invented or discovered certain newfand useful Improvements in Road-Building Forms, of which improvements the following is a specification.

Our invention concerns forms for roadbuilding. Vhile the material of which the road is `built is not a limitation ofthe field of our invention, we have developed it as a form for building concreteA roads, and we shall in the ensuing specification vdescribe it in use in building concrete'roads. Formsl of the general-sort, upon whichwehave made improvement, are adaptedv to beerected temporarily in parallelism, along either side of the, roadwayunder construction, and when infplace to serve as the limiting walls in the kSpreadof.paving material and to serve also as vrails upon which the spreading and finishing apparatus may travel. The forms are made of lengths'V of sheet steel, of properly7 shaped and proportioned cross-section, and

thelengths are fitted and secured together, vWhen the' forms have served.

end to end. Y the uses described, `and when the pavement spread and shaped between themhas hardened, the forms are removed. The'fact that they are made upv in lengths fitted together facilitates removal, and also makes possible '35 a progressive laying, so that from end to end of'a strip of road, the forms will never be entirely removed, lbut will extend farther and farther, by the addition of fresh lengths as work advances. To? rearwardy the lengths 40 will be removed, as road-building progresses. 'Ihe` Objects of our inventionare facility of installation and Vremoval and firmness in service.

In theV accompanying drawings Fig. I is a` plan viewy from-y above of the connected ends of two-lengths of our improved form,

as the structure appears when in Servicepo- Sition. Fig. II is a view in side elevation of the 'sa-me assembly. Fig. III is a horizontal section, on the plane indicated by theline III-III, Fig. II. Fig. IV is a view in transverse and verticalsection, on the plane indicated. at IVe-IV, F ig. II. Figs. V and VIare views corresponding to Figs. I and II, but Showing the two form lengths separated and standing apart, .one from the other.

spectively, in F ig. VI.

conveniently made from a rolled ysheet or plate ofsteel, fashioned' into the cross. Sec- Figs: VII and -VIII are views in" v transverse and vertical section,'on the .planes f indicated at VII-VII and VIII-VIII,A re- 60 A length ofthe form vof our inventionv is tion sufficiently shown in F ig-s. IV, VII, and l VIII, and including'a median web 1, which when the form is in place servesas the re-vv taining wall for the wet concrete, a flange 2 which serves as a'base', and a flange 3 which serves as a head. The structure is adapted v tOstand upon its. base 2 and to afford by.Y its head 8 .a-` track upon which the'roadspreading and finishing instrumentalities" may travel. The edge of flange-'3 is downturned, asappearsv at 4. f

It is the left-hand face of the structure as seen in Fig. IV against which the concreter is spread.

On the opposite side of the steel shape,

and vwithin the channel formed with the web l by the flanges 2 an'dB, stake-boxes are secured at proper intervals. As hereinafter will appear there is preferably astake-boxv immediately adjacent kone end of each formv length, and there will be one or more additional stake boxes secured atgsuitable inter-f vals therefrom. i v v The stake-box of our invention is cut from steel' plate, shaped and riveted to place. 4'Its vertical walls 5 are flangedalong'the inner and lower edges and riveted to the web 1 and to the base flange 2. The upper wall 6 of the box forms a sloping roof,'and extends from the channel web beyond the downturned'edge lof head 3., vIn the Opposite side walls 5 of thestake-boX opposite pairs of openings 7, 7 and 8, 8 are formed; and in the upper wall 6 and in the' base flange 2. opposite openings 9 and l0 are formed. The openingl() isi of suitable size to allow free passage ofa stakell, and `opening' 9 is.V ofsuch shape and size that the introduced stake fits snugfwithin it. A'Ihe stake is preferably square in cross section, and the opening 9 is correspondingly rectangular.

the openings 7 are so particularly placed' that when the form is assembled with the stake,'the driving home (left to right, Fig.`

A wedge'12 Slides in the openings'7, and

I) of wedge 12 will insure the gripping of the stake:1 between thewedg surfe andthe" opposite and lower edge ot' opening 9 in the upper wall mof thestake-box. `The wedge is' conveniently riiade" of' Steel" sheetv or plate cita'ritltben't to'shpe'z Y Itisjelariyrielshaped" in cross-section, and,"bf"virtue" of this par! ticular shape, conjointly with tl'ie"l squareshape of the stake and the rectangulersliape Vof opening 9, the engaging surfaces and f edges are extended, and the wedging engagevstair'ebol: tends to"shed"wtconcrete' which" may accidentally tall upon it."` It will"l be A' observedof the? sidef'wallsi'ot the stakelbozr th'attheyfare'fcut-` away at theirE inner corners' 13, to facilitate thev removalof concrete whichmay accidentally indlodgment with; in, as well as of other: accumulations. 'he'- whole structure` is' strong' to' endure serv-- ice" conditions:- The stakeebi;` becomes' a bracket, bracing the web and bottomf flange otthechannelr Y I u Ale have said* of'v the" stakelb'ox thatv through' oppsite walls"` it"A is'l provided with" openings' 8,18. These have'A to de' with" the" unionl` ot"Y suecessive lengthsV of the' form in" endete-end" articula-tieni' And yit', is" thosestake-:boxesfon'ly which@ are arranged" imine#` diately adjaldent theendiof thie'length -wheh need be provided with these" openings:y

- Other' morel rembteV stake-boxes" may la'ok` the openings 8, 8." p y The topy flanges seat witlrepposifteiy off-set". edges, preferably obliquely inclined? asf will be1'se`e1'rbest in FigzV: @none-end of eaehflngth (the righteha'nd end," ais' seen in Vy" the topange 8 with itsy depend; ingf.-y edge 4- projectsibey'ond `web 1" and base' Harige 2i;" .at'- the other' end- (the lett-hand' end) the"y flanges 3,145 are co'rres'pon'"dinigl'v cutj away.' By'V this' particular provision it will be' peroeived" that two" lien'gtlrs'fj m'ayf mayb'e"` brought together b 'v" transverse shiftiifrg;i and thaty as one 'length (the length` to the left, Figa 1) is moved'l upward (afsf'viewed i'rithe' draitfii'rg) relatively' tothel ,compari-in length, the: obliquelv disposed" edges a, o'fangeslcome'to'bearingone on a-nntlieig andi resist' further" movement. It will be" perceived alsov that by virtue yotL` the" obliqute arrangement of the' meeting edges of the'lange 3," a5- continous support isa'tforded for a vehicle wheel runningupon the foi-ini t It is the lett-hand end of the length which fbQX alleedy end, the right: 7o l e apples '14- This" plate" is ot'p'roper'aid shape` to b e brought tothe position shown in Fig. VII, and riveted to place. It lies closely upon web 1'andwthinflanges 3 and 4. Its lower 75 margin is inclined somewhat, and meets and` is riveted to the base langez21nearthe' outer" edge'of'flange 2 and beyoirid-the verticaipro'- long-ation' ot the` plane oilaiige' 4i Aft'v itsA heel the plate' 14k standsawa'y'- from the? 80 corner' formed by and between web 1" and-l base' iiange 2, as-isindicated altas'.v 'I`l re"1nifl web'ot plate 145 extendsfbeyond itsupper" f andr lower' ianges fin a tongue 15'.' The' 'platef lit throughout Aall its'extent'projects1from185 the end of the form lendth by as muclrfafthe flanges 3^ and yaentend, vand thetongu' 1-5r e'X- tends to still-greater distante; By virtlieof' this particular constructioinitmatters not" whether the progress' ot' uniting-v1successive'y 90 form lengths endt'o endtbeinV onedirction" or thev other'. hestructure'` described at-ftords support', the'. already' .placed sectionsustaining the newly appliedsection-eatjthef proper elevation af'nd Kiri properi positi0n;95 W hen 'the' adjacent lengths 'are' by transverse:` movement fitted together, the' tong-ueil of. one'part abutting yagainst the mid-web tot the other, will (additioi'uallyvtotheengageL4 ment ot edges aand b) resist further motiefment' and effect accurate alignment` Upn" thev tace oit plate 14,-andl riveted taplafee with it upon thewebf'lof'the form' lengthf lies a reinfbreingbar 16.I f It may noti-pro'- trude as tar asdoes the'tongue 15. It s'ervesl()5 to resist and distribute wedge pressure;

TheA stake-box adjac'eriti -thef endE ofi theil form length carriesl in itsh openings* 8; 8=v wedgell', sin'lila'rf in" strtieturef' to wedgep 12?? orrn :halve "beenl brought toget'hergvll to" the p? sition' sho-wn'V in Figs -IIIII, the Wedge? 17 is" shifted from" right tol left, and."y its'erve'sltff clampbar 16"'and plate'l4 upnthe- 1 olf the torm'lengthfwhieh carriesthestakebz" H5 Thus' the" torni length-s",a-resecred in ab? curately aligned position- *It'isfa'f matte?fl gte'at advantage the# by' the part means shown 4the form lengthsf may" be? brought together and separatem by'l tr 120 verse' movement, and do not`"reqiiii"e len-gif tu'dnal telescopio move'ment",v a'sis usual.

' 1Weclaini as" ourinvention: I

1.- A* tormv'tor Vroafd building iiicluding'a chaniiellshaped member adapted to" stand? with its medial web presented in" ,vi calf position'- to the work, said channelesiapedf member catryingI withinI theChannel a staliie bbs: withV inclined and ported upper Waljli; and a wedge been'efb'y anali-semble m1651130 Y duced stake.

bearing in the stake-box, arranged opposite the lower rim of the port in the said upper wall and adapted to cooperate with the 0pposite rim of the port in gripping an introadapted to cooperate with the opposite andy lower rim of the port, and to clamp against such opposite rim a stake with opposite parallel sides.

3. A form for road building` including two channel-shaped members adapted to stand with their medial webs presente-d in vertical position to the work, one member being provided with a tongue extending from its web portion at one end and adapted when the two members are brought together, to overlie the web of the other member, and a stakebox borne by the other member land carrying a movable wedge adapted toy clamp the tongue of the member first mentioned against the web of Ithe second member.

4. A form for road building including two channel-shaped members adapted to stand with their medial webs presented in vertical position to the work, one' of said members bearing within the channel a flangedvplate spaced from the inner face of the member `vwhich carries it along the inner portion of the base flange but elsewhere ly-` ing` closely upon the inner surface of such member, said flange plate extending beyond the end of the member which carries it and l adapted to overlie the inner face `of the,r

other of the two lchannel-shaped members, a wedge movablyborneby such other member and adapted. to clamp the Aplate ofthe` f member first named against the web of the member which carries the wedge. v

5. A form for road building including twol 'channel-shaped members adapted toy stand Y with their medial webs presented in vertical` position to thework, the upper flanges of adjacent ends of saidv members presenting each to the other oppositelyfoiset edges, and meansborne by one for clamping the other to itself with said oppositely off-set edges in engagement.v A j j 6. A form for road building including two channelshaped members adapted to stand with their medial webs presented in vertical f position to the work, the upper flanges of adjacent endsfof said members presenting each to the other oppositely off-set edges,v

one of said members provided with a projecting tongue-adapted to overlie the medial j web of the 'other member and suchl other member carrying movable means forclamp 'ing the overlying tongue to itself, the oppositely off-set'edges of the upper flanges being in engagement. y l. j

7. A form for'road building including two channel-shaped members adapted to stand with their medial webs presented in vertical positionv to the work, the upper flanges of adjacent ends of said members presenting each to the other opposite obliquely disposed' edges, whereby when two lengths are assembled the'somade up form afford continuous BERNARDH.- KERSTING. f vean B. EDWARDS. 

